triethylamine in dichloromethane T=20°C;

1: With tris(dibenzylideneacetone)dipalladium(0) chloroform complex; tBuCH2CH2B(H)NiPr2; triethylamine; triphenylphosphine in tetrahydrofuran T=65°C; Alcaraz-Vaultier borylation; 12 h; Inert atmosphere; 2: With methanol in tetrahydrofuran T=0°C; Inert atmosphere; Further stages;

triethylamine; palladium diacetate; 1,3-bis-(diphenylphosphino)propane in N,N-dimethyl-formamide T=60°C;